PRD Tech, Inc.

Biofiltration Treatment of α-Pinene

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Courtesy of PRD Tech, Inc.

This paper provides an overview of air biofiltration with experimental data on the performance of a synthetic media biofilter system. It is shown that use of high surface area per unit volume structured media results in higher contaminant treatment rates per unit biofilter volume. It is shown that use of specially designed synthetic media allows effective control of biomass buildup by continuous removal of biomass from the biofilter media and that the biomass removal rate depends on nutrient and biocatalyst flowrate.


Remediation of contaminated air is needed to protect ecological and human health. Potentially cost-effective systems for remediating contaminated air use biological treatment to degrade or transform contaminants to innocuous residuals1,2. The literature describes three major biological systems for treating contaminated air: bioscrubbers, biotrickling filters and biofilters. Bioscrubbers, which are not evaluated here, use counter current gas-liquid spray columns with microorganisms freely suspended in the aqueous phase. The contaminants, transferred to the recycling water during contact, have sufficient residence time in the system to be microbially degraded or transformed.

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